About this Abstract |
Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
Symposium
|
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
Presentation Title |
An Experimentally Validated Phase Field Model for Anisotropic Ductile Fracture in Additively Manufactured Metallic Materials |
Author(s) |
Nolan M. Ruble, Trisha Sain |
On-Site Speaker (Planned) |
Nolan M. Ruble |
Abstract Scope |
Additively manufactured metallic materials have recently emerged in industrial use to overcome design challenged posed using conventionally manufactured metals. The plasticity exhibits anisotropic behavior similar in nature to that of cold-rolled metals, while the failure mechanisms are uniquely anisotropic due to the manufacturing methods. In this work we attempt to characterize the ductile fracture of additively manufactured metals using the classical Hill anisotropic plasticity formulation in combination with the phase field fracture model. In the proposed formulation, the phase field smears the propagating crack over a length scale parameter. In this way, the displacement jump created by the crack is approximated as a smooth transition. The development of the crack surface is solved by minimizing the Galerkin-type weak form of the total energy expressed in terms of a regularized crack surface. A plastic work threshold is utilized to control the point at which plastic deformation begins to contribute to the crack growth. We model the constitutive behavior by considering the additively manufacture metal as a homogenized material having an isotropic elastic response combined with an anisotropic plastic yield criterion.
The model results will be compared with experimental tests performed on multiple standard specimens including SENT, SENB, plate with hole, and tensile specimens in order to characterize the models ability to capture the effects of anisotropic plastic work in driving ductile fracture at a variety of strain rates. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |